Punch for castellating nuts.



L."H. BRIGHT MAN. PUNCH FOR GASTELLATTNG NUTS.

APPLICATION FILED DEC. 21, 1912.

Patented Apr. 28, 1914.

FIG. 1

@ Hum um 4 U W 9 i .2 @22 ,r/ a 3 I u INVENTOR. IATHAM H BRIGHTMAN ATTON151.

HUT/WIS $55 L. H. BRIGHTMAN. PUNCH 1:011 GASTBLLATING NUTS.

APPLICATION FILED-D3021, 1912.

Patented M11126, 3924..

2 SHEBTS-SHEBT 2.

v Y 'INVLNTOR. v LATHAM H.BRIEHTMAN I structed according to the bestmode I have trate the novel features of my invention, the

a the line A Fig. 3. Fig. is. a detail view I UNITED sTArnsra rENTOFFICE.

LATHAM H. BRIG-HTMAN, OF COLUMBUS, OHIO.

PUNCH FOB CASTELLATING NUTS.

To all whom it may concern: 1 g

Be it known that l, Larrra'n II. BRlGll'lE MAN, a citizen of the UnitedStates, residing at Columbus, in't-hecounty of Franklin and State ofOhio, have invented certain new and useful Improvements in Punches forGasteIlating Nuts, of which the following isa specification.

present ii'ivention relates to improve ments in a punch for caste-Hatingnuts and like articles, and is. designed to overcome certainobjectionable features attendant upon the present" mode of performingthis work by providing certain novel features and combinations of partsthat will perform the functions in a more efficient manner, by a morefacile manipulation, and a more economical fashion. in the accompanyingdrawings I have illustrated one complete example of the physicalembodiment of my invention conso far devised for the practicalapplication of the principles of the invention. Figure 1 is asectionalside elevation of machine eml'iodying the novel features of myinvention, parts beingshown in section, and some parts omitted forconvenience of illustration. Fig. 2 is an enlarged elevation of so muchof Fig. 1 as is necessary to i.llus-- punch bein shown in raisedposition. Fig. 3 is a top p. on vi'ewof Fig. 2. Fig. 4: IS an end viewof Fig. 3, partly" in section taken showing the nut holding stem andanvil, and the clearance spacebetween the nut and, anvil. Fig. 6. showsa blank nut before castellatin-ga Fig. 7 shows the blank castellated andFig. 8 shows an, end view of the castellated nut.

In performingthe operation of castellating nuts and similar articlesaccording to the modes with which I am familiar, wherein the notches orgrooves are form-ed by a milling machine, considerable time is expendedin the operation, and a'bur s invariably present upon the outside of thenut formed by the mill-mg tool as it passes across the nut. To overcomeand eliminate these and other objections present in milling machines.for this purpose, I adapt. a punching Specification o f Letters Patent.

Application filed December 21, 1912.

into the socket 24.- of t Patented Apr. 28, 1914. Serial l\To. 73 8368.

machine for the purpose of forming. the

notches or grooves in the nut.

in the drawings a standard type of punch. mg machine is -by the numerall.

illustrated, and designated The punch or tool 2 is formed with acut-away portion or notch 3 by means of which the depth of the groove tobe cut may be gaged or determined, and

this tool is held in its standard or usual holder 4 of the verticallyreciprocating head 5 of the punching machine. A rotatable cam oreccentric 6 revolves with its shaft 7, and, through the friction roller8 actuat-es the rocker arm or lever 9 that is pivoted in the frame ofthe machine at 10-. A spring 11 which is hooked into one end of therocker arm extends over the pin 12 on the bracket 13 of the sleeve 14,and the sleeve isadjustable on the bar 15, a set screw l6 being providedfor holding the sleeve in adjusted position. These elements, thereciprocating punch and rocking lever or rocker arm, are shown asexemplifying structures and may be varied, if desired, or other devicessubstituted for performing their functions.

in adapting the machine for use according to my invention I employ thebase plate 17 which is attached as bybolts 18 to the lower jaw 19 of themachine; In Figs. 1 and 2 it will be observed that the plate extendsbackwardly a considerable distance beyond the rear of the jaw andis, sofar as the extension is concerned, unsupported. At the rear end of theplate 17 abl'ock 20 is-located upon which is supported the member 21which is a cylindrical bar having opposite flattened faces, and the baris secured, through the medium of the block 20, by. bolts to the baseplate. From this" description taken in connectionlwith. the drawings itwill be evident that a flexibility or resiliency is present due to thearrangement of the plate. block and bar as described.

The forward or front end of the bar ljl is bored to fit a stem 23. Thestem 23 as illustrated in the drawings is of uniform diameter throughoutits, length, but it will be understood that, althou h the end which fitsfie bar 21 will be of uuiformsize, the forward end of the stem may beincreased or diminished in size to adapt stemfor use, with varying sizednuts. In this manner a set or series-of stems is provided, and the stemsare interchangeable in use with the supporting bar 21. Each stem isprovided with a slot 25 extending t'herethrough, which, when the stem isin proper position, extends vertically. of the stem, and the stem issecured in position by means of a bolt or set screw 25 that is threadedinto thcbar 21.

A slidable sleeve 26 incases the reduced forward end 27 of the bar 21,and by means of a ring 28, which is threaded on the rear end of thesleeve, the sleeve is connected through the medium of a pair of links 29to the lower end of the rocker arm 9. The sleeve is limited in itsrearward movement by the shoulder 30 of the supporting bar 21, i

but may be moved forward when the rocker arm is actuated as will beunderstood. The lower half of the front end of the sleeve is cut away toform a hood, and the hood is slotted, as at 31 to aline with the slot inthe stem 23, so that the reciprocable punch may pass through both slots.

An anvil or block 31 is securely bolted to the base plate,'and the anvilis formed with a semicircular recess 32 disposed about the front end ofthe stem 23. s

In Fig. 6 a blank nut is illustrated, and in Figs. 7 and 8, this blankis shown as having had the slots 33 punched therein across the face ofthe sleeve portion 34.

It should be understood that the nut blank is castellated .prior to theoperation of threading or tapping, so thatwhen the nut is slipped overthe front end of the stem 23 there are no threads to be mutilated.

The modus opera-nth of the device is as follows: The-nut blank isslipped over the stem 23, either by hand, or if desired an automaticfeed may be employed. When placed in position on the stem the nut isheld, as by a pair of pliers and may be so manipulated. In Fig. 5 itwill be noted that there is a slight clearance between the sleeveportion-34 of the nut (dotted lines) and the curved recess 32 of theanvil. This admits of facile application of the nut to the stem,

and also allows for a certain degree of give or resiliency of the nutsupporting lements, when the punch descends.

In Fig. 2 the punch or tool is about to impinge against the sleeve ofthe nut to cut the slot or groove therein, While in Fig. 1 the tool isillustrated as having punched the material to form the groove, and thetool is about to ascend. The operation of the cam 6 will rock the lever9, and, after the punch has been withdrawn from the slotted hood andstem, the sliding sleeve will be forced forward or outwardly on the barto push the castellated nut from the stem. After each movement of thepunch, the nut is turned on the stem-to present another point forcutting a slot. In the drawings I have illustrated a hexagonal nut, andwhile this could, if desired, be castellated by only three movements ofthe punch, I prefer to include in the operation of castellation, sixmovements. By utilizing six movements or strokes of the punching tool,and as illustrated in the drawings, the punch acts on the metal cuttingfrom the perimeter of the sleeve 34 to the bore ofthe nut only, and notcrossing the axial center of the nut. in this mode of cutting, a bur 0nthe outside of the nut is obviated, and the bur that is formed as aresult of the passage of the tool is located at the inner bore of thenut blank may be ignored in the further process of perfecting the nut.

The .construction of the assembled base plate. block, and supportingbar, as before described, permit a slight flexibility or resiliency, sothat when the tool comes down against the nut to be punched, the nut onthe stem will give sufficiently to permit its being seated firmly on theanvil during the tooling of the nut, but as the tool is withdrawn, theresiliency of the parts returns the nut to normal position where it maybe either turned for another movement of the punch, or be expelled fromthe stem by the sliding sleeve.

It will be evident of course that other forms and sizes of nuts may becastellat-ed other sizes of stems employed to suit the nuts, and alsothat other tools or punches of varying sizes may be utilized asrequired.

Having thus fully described my invention what I claim is z i 1. In amachine as described a support comprising a base plate. attached toandproiecting beyonda portion of the machine, a resiliently supportedholder having a socket and supported from and above the base plate. apunch, a stem in the socket, having a guide slot for the punch, and ananvil in cooperative relationship with the stem.

2. In a machine as described a support comprising a base plate attachedto and projecting beyond a portion of the machine. a resilientlysupported holder having a socket and supported from and above the baseplate, a punch, a stem in the socket having a guide slot for the punch,an anvil as do scribed, and a slide, sleeve on the bar with actuatingmeans for ejecting the completed work from the stem.

In a machine as described a support; comprising a base plate attached toand projecting beyond a portion of the machine, a resiliently supportedholder having a socket and supported from and above the base plate, apunch, a stem in the socket having a guide slot for the punch, and ananvil as described.

4. In a machine as. described the combination with a reeiprecahle too],of a resiliently In vtestimony whereof I afl'ix my signat re supportedbar, a base plate to which the in presence of two Witnesses,

bar is secured at one end, and an anvil :ulr V r v v; jacent the bar andarranged to receive the LA I load by the pressure of thereciproeabletool Witnesses: as the latter engages a nut, for the purpose 0. M.bimewr, described. I IDA A. EVANS.

Copies of this patent may be obtained fol-five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

